of chicago



March 1, 1932.

G. O CONNOR ET AL PROTECTED SCREW TAKE-UP fzz/ 5607 e,

CMU" 6,5 J jfovar MMM@ ,5

Patented Mar. 1, 1932 'Y 'U'.NI`T1'1'Df-:-STMESPATENT OFFICE GEORGE OCONNOR ANDICHARLES J. HOBART; OFk CHICAGO,ILLINOIS, ASSIGNORS TO `LINK-:BELT COMPANY,k OF CHICAGO, ILLINOIS, ACORPORATIONOF ILLINOIS Pieorncniiinl SCREW` TAKE 'Ur Application iiied :December 8.1927. serial message?.

Our invention relates to a new and improved form of protected screw take-ups of the type wherein a bearing is slidably mounted on a base and so associated with a screw that the bearing may be laterally displaced to take up slack in the belt or chain or may be laterally displaced to align a shaft. Among the objects of the invention are to provide a take up wherein the adjusting screw will be enclosed entirely within the supporting housing and remain so enclosed without extensive projecthe foot, the side walls'of the foot B9 B10 betions no matter what the position of the take up. Another object is to provide a structure wherein the screw will always be in tension no matter which way the t-ension on thetake up comes. Another object is to provide a take up which will be cheap, light and durable. Other objects will appear from time to time throughout the specification and claims.

Our invenion is illustrated more or less diagrammatically in the accompanying drawings, wherein- Figure l is a side elevation;

Figure 2 is a section along the line 2-2 of Figure l;

Figure 3 is an end view;

Figure 4 is a plan view.

Like parts are indicated by like characters throughout the specification and drawings.

vided with apertures at the bottom and at the sides as indicated at A1 and A2 so that the housing and support may be bolted either to a support at its bottom or along its side. The ends of the channel are closed by rigid panels A3 A3 preferably welded to the channel, which panels or end plates are apertured at A4. A5 is a bearing plate extending along the upper outside wall of the frame, pret#y erably held in place at its two ends by the bolts A and since it is bolted, it is removable for replacement. This guide member or plate reinforces and stifens the take up frame and serves as a guide for the bearing which is slidable along the take-up and locks or positions the bearing in place holding it against twisting.

B is a bearinr block having-0n its underside a pad B1 adapted to rest upon theV guide plate' A3. Lugs B2 B3 extend downwardly I from the pad B1 on opposedsides of the guide A3 to hold the bearing against rotation or twisting with respect to the guide. The lug v B3 extends down beneath the upper flange 0r wall of the take-up housing and has a foot Brextendiiig inwardly into the housing. 'This foot contains a pocket B5 having iiilt engaging surfaces BG B7 inclined one to the other and adapted loosely to engage anut BS to hold it against rotation with respect to ing so positioned with respect to opposed sides Vof the nut that the nut is held in place vbearing VB.

r:C is a take-up screw. It extends clear through the take-up li'ousing'froni end to end being rotatable in the apertures A? in the' end plates A3.v C1 C2 are nuts threaded on Vthe" ends of this screw where it projects beyond thetake-'up housing. These nuts are screwed onto the take-up screw far enough to' make a tight 'fit with the ends of the housing butnot :tar enough to jam. Pins C3 hold the nuts a'gainstrotation with respect to the screw, the screw being also threaded in the nut B3 and passing through apertures in the walls Bg B10 of the bearing foot. i A is a channel shaped housing. It is pro- D'D are reinforcing plates contained inside the channel intermediate its ends, preferably welded'iii place. These plates terkin iii'atesuihciently short of the take-up screw teclear the nut Bs and the foot B4 and serve to stiften4 and reinforce the channel without `tooy greatly increasing the weight of the `trame.4

The use and j operation of our invention are as' follows: l Y

The take-up is assembled by placing the Vbearing'on the take-up frame. Then the screw is passed inwardly through one of the Then the The bearing may be moved back and forth along the guide plate and along the take-up by rotating the take-up screw,a wrench working on either end being equally effective. Y

Movement of the screw since the central nut is held against rotation by the bea-ring foot will result in moving the entire bearing back and forth along the take-up, the screw having no movement except its rotational movement.. It will be noted that the screw extends clear througl'i thev end plates of the take-up, the only limitation to the movement of the screw being the engagement Vof' the two end nuts with the opposed outer ends of the end plates so that no matter in which direction the tension on the take-up comes, -the load is carried by the screw in tension -between the nut on the side of the bearing opposed to the load and the nut engaging the bearing foot. It will be noted that 'in the preferred 'form the take-up channel is rolled stock closed at the ends by a Welded plate or panel. Obviously of course these parts might be castings but if they were they would have to be heavier to get equal strength and therefore my arrangement preferably takes the form of sheet metal built upv take-up jtrame.

We claim: 1. A take-up comprising a channel open GEORGEy OCONNOR. CHARLES4 J. HOBART.

along one side and closed at the ends, a screw y contained within the channel and rotatable within the closed ends thereof, a nut on the screw inside the channel, a pad adapted to lie outside of the channel, grooved to engage a track, a track removably mounted ont the outside Wall of the channel adjacent to the openingthereima foot integral with ythe vpad extending downwardly and inwardly into the channel, the clearance between. the ktoot and thepad being less than the total thickness of channel and track, the track being held'removably in position on the channel and meanson the foot to engage the nut and hold it against rotation, said means being also @adapted to prevent relative longitudinal movement ofthe foot and the nut.

A 2. A take up comprising a channel, closed at top, bottom and one side and openy on` the other side, the top and bottom exterior surfaces of the channel being parallel to permit the channel to rest directly throughout its entire length upon a suitable supporting device, a track removably mounted on and eX- tending along the upper exterior side ofthe channel, a. pad grooved to engage the opposed sides of thestrack as its travels tlierealong, a bearing carried by the pad, an arm extending downwardly at right angles to the pad, across the edge of the channel, a foot carried by the arm extending laterally into the channel, a nut engaged b yk and carried by the foot, a screw rotatable in the ends of the channel, contained within the channel and in threaded relation with the nut,l the depth of the groove 

